YOUR03COBRA8ME

STS did a turbo swap with me for no charge i had a 60-1 .81 housing
now i got the 60-1 .96 housing going for more top end i wasnt happy with the .81 spooled up really fast but had no top end i havent been posting lately due to personal problems the last i posted i broke the ram 980 they sent me a 910 for a good deal !!new turbo, methinal injection and ram clutch ,42#injectors and a inline fuel pump are now in the car just bought a trailer now i am trailoring it to Orlando for some 8-9psi tuning

MIGHTYMOUSE

iTrader: (59)

go to the track. ok

CHRISPY

looking forward to hearing the track and dyno results

JZ 97 SS 1500

iTrader: (2)

Going to the .96 A/R isn't going to do a whole lot for you. It will help somewhat, but the bottleneck is the 60-1. A 60mm turbo is a little small for our motors.

Jose

BIGBOS

Will an 76 or 88 fit in that rear area?

slow

iTrader: (7)

i would love to see a 88 spool back there.

Ryan

99Fbody99

A 60-1 with the correct trim has enough to produce over 500rwhp.

BigPlanTransAm

keep us posted and prove the naysayers wrong!

JZ 97 SS 1500

iTrader: (2)

Not saying a 60-1 won't work, it just won't work very efficiently. The largest trim possible is a 60-1 Q-trim with a 1.70 A/R. But still the motor will be off the compressor map at anything more then 14-15psi. You will be running the turbo very close to the choke line almost all the time. Not exactly an efficient way to make power with a turbo. I'd be happy to post the compressor map and 346 CI flow requirements to better explain if you don't see what I'm talking about.

Jose

BlackCamaroSS02

iTrader: (8)

so what would be a good size turbo to produce say...600-650RWHP?

JZ 97 SS 1500

iTrader: (2)

For that amount of hp with a 346 will require about 15psi, a T72-T76 is the best in efficiency at that range unless you are willing to run a T88 and larger. Also you would have to take into account the rev range also. The higher the revs the less boost you will have to run to reach your hp goal.

Jose

Zombie

iTrader: (2)

I've been tuning a STS turbo car here in Vegas with a 67 turbo on it. Spools up good and makes awesome power. he goes by byardog on here I believe. Car trapped 117 on 5lbs with all sorts of misc issues (clutch,maxxed out fuel pump on 42lb injectors, 4.10 gears which suck for a turbo car). After they get sorted out I see this car trapping 120 on 5psi. If we add some water alky to it and up the boost to 8 I don't see why it wouldn't trap in the mid 120's.

A 67 is a great turbo and seems to work very well.

JZ 97 SS 1500

iTrader: (2)

At that low of a boost pressure on a stock motor assuming 6000rpm redline, a 67GTQ or 68-1 Q-trim would work better for that instance. A turbo should has to always be chosen for the rpm range, cubes and boost pressure. As those parameters change the turbo will have to change if you want an efficient setup. For this instance a 72-76 would be above the choke line....wouldn't work to well.

Jose

99Fbody99

60-1 base is 57 pounds..

and 12-14psi on an LS1 is more than enought ot make 500rwhp..

Which means it actually sized quite nicely..With the correct trim of course..

So, who in here cant make 500 rwhp with 12psi??? Not to mention a 60-1 will make more boost than a stock piston will want to see.

JZ 97 SS 1500

iTrader: (2)

A 60-1 operating at 12-14psi on a 346ci motor is way out of its efficiency. The incoming air is being super heated by that time. You will be well past the choke line of the turbo. Just look at the compressor map below....





Just look at the data...346ci, assuming 5800rpms, 1.82pr=12psi , .85 EV, and 120 deg IAT, the motor is consuming ~58 lbs/min of air. Just looking at the compressor map above you can see that its way out of its efficiency, and out beyond the choke line. I figure, if I'm going to spend 3K plus on any turbo system, I want it to work as efficiently as possible and making the most power per lb of boost possible. Just my $.02

Jose

MYTURBOT/A

The 60-1 won't make 500hp on an ls1 without running at least 17psi. I'm running 13psi right now and my graph shoots up to 430hp by 3800rpm and flatlines at that all the way to redline because the turbo runs out of steam. Turn up the boost and i don't make anymore power.

BigPlanTransAm

are you sure you have enough fuel?

Zombie

iTrader: (2)

A guy here in vegas made 470+ on 8 psi with water/meth on a 60-1 STS setup. This was on a eddy current superflow dyno and with a tune that was super rich (off the scale rich).

MYTURBOT/A

Yep, but thats with water/meth to cool the intake charge. Theres many mustangs that are lingering around 500hp with the 60-1 but the ls1 moves alot more air for some reason.

Bigplantransam, I had plenty of fuel in fact it would get richer as the boost falls off.

The highest I have ever seen a ls1 dyno with the 60-1 is 470rwhp but the intake temps were crazy from all the extra heat from the turbo not to mention over spinning the turbo will ruin bearings and seals in the turbo.

If you had a heads/cam fully built ls1 you might be able to get close since you'd be over 400hp N/A
But your IATs would be unreal.

F8L Z71

This is where I am at right now on my truck.

I read about one guy making gobs of power (514rwhp/586rwtq) on a stock 5.3L truck but his power fell off sharp at 5k rpm. His exhaust housing was too small so he is upgrading. I believe I have the same turbo he did and dont wanna run into this problem so STS is gonna set me up with a bigger turbo also.

My current piece says 61mm to 68mm written on the turbo but I'm a noob and don't know what it means. LOL

Once I get the new unit and get it all installed I'll be sure to post up #s and track #s ASAP. I'll make sure to get video too and anything everyone needs to make up their minds as to wether this kit really works or not.

Ohh, ET in my sig is N/A. Not with the turbo.